Chapter 8 - Fire Protection

Question 1

Pulling the engine fire warning switch up:

Answer 1

a. closes both the engine fuel shutoff valve and the spar fuel shutoff valve.
b. deactivates related engine driven hydraulic pump LOW PRESS light.
c. closes the hydraulic fluid shutoff valve and disables the thrust reverser for the related engine.

Question 2

Some of the indications for an engine fire are the MASTER CAUTION lights, the ENG OVERHEAT light, the Master FIRE WARN light, and the red fire switch light illuminate.

What are the other indications?

Answer 2

a. The fire warning BELL sounds.
b. The red FIRE switch light illuminates.
c. The OVHT/DET system annunciator light illuminates.

(6 lights and a bell).

Question 3

Fire extinguishers provide a means of extinguishing:

Answer 3

1. Cargo Compartment fires.
2. Lavatories and
3. Engine,
4. APU

(Fire extinguishers CLEA the air).

Question 4

Illumination of the APU DET INOP light indicates

Answer 4

no fire protection, do not start the APU

Question 5

Placing the TEST switch in the FAULT/INOP position test:

Answer 5

the fault detection circuits for both engines and the APU

Question 6

Engine fire detection requires:

Answer 6

both detection loops must sense a fire or overheat condition.

Question 7

Pulling up the APU fire warning switch

Answer 7

a. closes the APU air inlet doors.
b. trips the generator control relay and generator circuit breaker, arms the associated
extinguisher and closes the bleed air valve.
c. closes the fuel shutoff valve and the APU inlet door, and allows the APU FIRE
WARNING switch to be rotated.
d. all the answers are correct.

Question 8

The power source for engine fire extinguishing is:

Answer 8

a. Transfer Bus.
b. the switched battery bus.
c. the hot battery bus.
d. None of the above is correct.

Question 9

Prior to performing the Fire / Overheat warning test with the APU operating:

Answer 9

ground personnel should be notified

Question 10

The illumination of the Engine / Overheat Detector Fault light:

Answer 10

indicates that that both loops on an engine have failed

Question 11

What form of fire detection and protection is offered?

Answer 11

• Engines, APU and main wheel well: overheat and fire detection.

Engines and APU: Fire protection

Question 12

The FIRE WARNING lights and Fire Warning Bell can be cancelled by:

Answer 12

Pressing the FIRE WARNING SWITCH or pressing the BELL CUTOUT switch.

Question 13

The FIRE WARNING lights illuminate when:

Answer 13

The engine or APU fire switch illuminates.

Question 14

The MASTER CAUTION lights illuminate when:

Answer 14

The amber ENG OVERHEAT or APU DET INOP lights illuminate

Question 15

When a malfunction is detected in a fire loop:

Answer 15

The fault monitoring system automatically deselects a bad loop, resulting in a single loop system.

Question 16

The FAULT light on the fire protection panel requires:

Answer 16

Both loops to have failed.

Question 17

The difference between the APU fire detection fault system and the engine fire fault detection system is:

Answer 17

The APU DET INOP light also causes the Master Caution to illuminate

Question 18

An engine overheat causes the following indications:

Answer 18

OVHT/DET & MASTER CAUTION

Question 19

Pressing the MASTER FIRE WARN light will:

Answer 19

Silence the fire alarm bell and extinguish the FIRE WARN lights. The fire switch lights will remain illuminated.

Question 20

What are the two ways of silencing the fire alarm bell and extinguishing the FIRE WARN lights.

Answer 20

Pressing the FIRE WARN switch or the BELL CUTOUT

Question 21

What is the main difference between the overheat and fire protection systems for the APU and engines.

Answer 21

There is no overheat protection for the APU

Question 22

What occurs when the engine fire switch is pulled up?

Answer 22

• arms one discharge squib on each engine fire extinguisher
• closes fuel, hydraulic shutoff and engine bleed air valves
• disables thrust reverser
• trips generator control relay and breaker
• deactivates engine driven hydraulic pump LOW PRESSURE light
• allows engine fire switch to rotate.

Question 23

When the APU Fire Warning Switch is pulled up:

Answer 23

• arms APU extinguisher circuit
• closes fuel shutoff valve, APU bleed air valve, and APU inlet door
• trips generator control relay and breaker
• allows APU fire switch to rotate.

Question 24

Which fault detection is provided?

Answer 24

Engine and APU only, not wheel well.

Question 25

The following occurs when the APU Fire Control Handle is pulled down:

Answer 25

• arms APU BOTTLE DISCHARGE switch (on this panel only)
• closes APU fuel shutoff, bleed air valve and APU inlet door
• trips generator control relay and breaker.

Question 26

Which lights should you expect to see for the fault inoperative test?

Answer 26

MASTER CAUTION

OVHT/DET

FAULT

APU DET INOP

Question 27

How many lights illuminate for the overheat and fire detector test?

Answer 27

11

Question 28

Which light does not illuminate if AC power is not available during an overheat and fire detection test?

Answer 28

WHEEL WELL

Question 29

Which light should not appear during the overheat and fire detection test?

Answer 29

FAULT

Question 30

The EXT TEST switch is used for:

Answer 30

1: Testing one discharge circuit for the engine and discharge circuit for the APU
2. Testing the other discharge circuit for the engine and discharge circuit for the APU

Question 31

The power source of the cargo compartment smoke detector is:

Answer 31

DC Bus 1 and DC Bus 2

Question 32

Which indications can be expected in the event of cargo fire?

Answer 32

• Fire Warning Bell
• FIRE WARN lights
• FWD/AFT cargo fire warning lights

Question 33

Which lights can be expected during a cargo fire test?

Answer 33

1. FWD and AFT lights
2. DISCH light
3. Two green lights

Question 34

Will the MASTER CAUTION illuminate if a failure is detected in one of the cargo fire loops?

Answer 34

No

Question 35

The amber discharge light can take up to ___ seconds to appear due to the time it takes for the agent to discharge:

Answer 35

30 seconds